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White-light OLED (organic light emission diode) device and preparation method thereof

An electroluminescent device and a technology of a blue light-emitting layer, which are applied in circuits, electrical components, and electric solid-state devices, can solve problems such as difficult white light emission, and are suitable for large-scale industrial use, high color rendering index, and easy to use in large areas. The effect of preparation

Inactive Publication Date: 2015-04-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using multi-layer light emitting, the change of the driving voltage often causes the distribution of the carriers to change, so that the distribution of the carriers in the multiple light-emitting layers changes, so that the light-emitting color changes with the voltage, and it is not easy to form stable white light emission

Method used

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  • White-light OLED (organic light emission diode) device and preparation method thereof

Examples

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Embodiment 1

[0042] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0043] (1) Provide a glass substrate, clean it, and then prepare a yellow light color conversion layer on one surface of the glass substrate by screen printing. Specifically, the yellow phosphor [Sr,Ba,Ca] 2 Si 5 N 8 :Eu 2+ It is mixed with the light curing agent polyacrylic resin in a mass ratio of 1:100, and then coated on one surface of the glass substrate. The screen printing process uses 200 meshes, and the thickness of the yellow light color conversion layer is 50 μm;

[0044] (2) The degree of vacuum is 1×10 -5 In the vacuum coating system of Pa, a red light color conversion layer, an anode, a hole transport layer, a blue light emitting layer, an electron transport layer and a cathode are sequentially prepared on the other surface of the glass substrate by using the thermal resistance evaporation technology to obtain a white light organic electroplating l...

Embodiment 2

[0051] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0052] (1) Provide a glass substrate, clean it, and then prepare a yellow light color conversion layer on one surface of the glass substrate by screen printing. Specifically, the yellow phosphor [Sr,Ba,Ca] 2 Si 5 N 8 :Eu 2+ It is mixed with the light curing agent polyacrylic resin in a mass ratio of 20:100, and then coated on one surface of the glass substrate. The screen printing process uses 600 meshes, and the thickness of the yellow light color conversion layer is 10 μm;

[0053] (2) The degree of vacuum is 1×10 -3 In the vacuum coating system of Pa, a red light color conversion layer, an anode, a hole transport layer, a blue light emitting layer, an electron transport layer and a cathode are sequentially prepared on the other side of the glass substrate by using thermal resistance evaporation technology to obtain white light organic electroluminescence. de...

Embodiment 3

[0059] A preparation method of a white light organic electroluminescence device, comprising the following steps:

[0060] (1) Provide a glass substrate, clean it, and then prepare a yellow light color conversion layer on one surface of the glass substrate by screen printing. Specifically, the yellow phosphor [Sr,Ba,Ca] 2 Si 5 N 8 :Eu 2+ It is mixed with the light curing agent polyacrylic resin in a mass ratio of 10:100, and then coated on one surface of the glass substrate. The mesh number used in the screen printing process is 1000 meshes, and the thickness of the yellow light color conversion layer is 20 μm;

[0061] (2) The degree of vacuum is 1×10 -4 In the vacuum coating system of Pa, a red light color conversion layer, an anode, a hole transport layer, a blue light emitting layer, an electron transport layer and a cathode are sequentially prepared on the other side of the glass substrate by using thermal resistance evaporation technology to obtain white light organic ...

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Abstract

The invention provides a white-light OLED (organic light emission diode) device. The device comprises a glass substrate as well as a red light color conversion layer, an anode, a hole-transmission layer, a blue light emitting layer, an electronic transmission layer and a cathode which are stacked sequentially, wherein a yellow light color conversion layer is arranged on one surface, facing air, of the glass substrate; the materials of the red light color conversion layer comprise a red light fluorescent material and a red light host material; the materials of the blue light emitting layer comprise a blue light fluorescent material and a blue light host material or comprise a blue light phosphor material and a phosphor host material; the materials of the yellow light emitting layer comprise yellow fluorescent powder and a photocuring adhesive; the light absorption wavelength peak of each of the red light fluorescent material and the yellow fluorescent powder ranges from 460 nm to 470 nm; the material of the anode adopts metal gold or silver. The white-light OLED device can realize emission of white light with stable light color. The invention further provides a preparation method of the white-light OLED device.

Description

technical field [0001] The invention relates to an organic electroluminescence device, in particular to a white light organic electroluminescence device and a preparation method thereof. Background technique [0002] Organic electroluminescence (Organic Light Emission Diode), hereinafter referred to as OLED, has the characteristics of high brightness, wide material selection range, low driving voltage, full curing active light emission, etc. It also has the advantages of high definition, wide viewing angle, and fast response speed. It is a potential display technology and light source, which conforms to the development trend of mobile communication and information display in the information age, as well as the requirements of green lighting technology. It is the focus of many researchers at home and abroad. [0003] In the prior art OLED light-emitting device, in order to form white light emission, there are various ways of combining light-emitting layers, such as multi-colo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/141H10K85/615
Inventor 周明杰冯小明钟铁涛王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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